@article{Cronbach_1951,
	doi = {10.1007/bf02310555},
	year = 1951,
	month = {sep},
	publisher = {Springer Science and Business Media {LLC}},
	vol = {16},
	number = {3},
	pages = {297--334},
	author = {Lee J. Cronbach},
	title = {Coefficient alpha and the internal structure of tests},
	journal = {Psychometrika}
}

@article{Cronbach_1952,
	doi = {10.1007/bf02310555},
	year = 1951,
	month = {sep},
	publisher = {Springer Science and Business Media {LLC}},
	vol = {16},
	number = {3},
	pages = {297--334},
	author = {Lee J. Cronbach},
	title = {Coefficient alpha and the internal structure of tests},
	journal = {Psychometrika}
}
